Equation of motion of a point in space is `x = 2t, y = -4t, z = 4t` where `t` measured in hours and the co – ordinates

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Q 1287312287.     Equation of motion of a point in space is `x = 2t, y = -4t, z = 4t` where `t` measured in hours and the co – ordinates of moving point in kilometers. The distance of the point from the starting point `O (0, 0, 0)` in `10` hours is
A

`40` km

B

`60 ` km

C

`20` km

D

`80` km

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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